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Modern Care Journal
Scientific Quarterly of Birjand Nursing and Midwifery Faculty
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Antibacterial Effect of Non-industrial Yogurt on Salmonella and Shigella
Author(s):
1Hepatitis Research Center, Birjand University of Medical Sciences, Birjand, Iran
2Department of Midwifery, Faculty of Nursing and Midwifery, Birjand University of Medical Sciences, Birjand, Iran
3Department Of Internal Medicine, Hepatitis Research Center, Birjand University of Medical Sciences, Birjand, Iran
*Corresponding Author: Corresponding author: Masoud Ziaee, Department Of Internal Medicine, Hepatitis Research Center, Birjand University of Medical Sciences, Birjand, Iran, Tel: 05632381268 Email: [email protected]
Published online:Jul 31, 2015
Article type:Research Article
Received:Jan 08, 2015
Accepted:Jun 29, 2015
How to Cite:Namaei MH, Ghannadkafi M, Ziaee M. Antibacterial Effect of Non-industrial Yogurt on Salmonella and Shigella. Mod Care J. 2015;12(3):e8861. doi:
Abstract
Background and Aim: Yogurt is one of the most consumed foods with different probiotic effects. The aim of this study was to evaluate antimicrobial effects of non-industrial yogurts on two common enteropathogens – Salmonella and Shigella.
Methods: In this experimental study, we evaluated the antimicrobial effects of 30 various non-industrial yogurt samples on 11 Shigella sonnei, 7 Shigella flexneri, 2 Shigella boydii, and 15 Salmonella enteritidis isolates. All bacterial isolates were locally isolated from patients suffering from diarrhea. Using the well diffusion method, we evaluated the antimicrobial effect of whey protein from yogurt before and after 24 hours incubation at 42°C. The data was analyzed using independent t test and chi-square in SPSS (version 11.5). P value less than 0.05 was considered significant.
Results: None of the yogurts had antimicrobial effect on Shigella and Salmonella isolates before 24 hours incubation at 42°C. After incubation, however, 9 (30%) and 12 (40%) samples out of the 30 yogurt samples showed antimicrobial effects on 25%-50% and less than 25% of isolates, respectively. Six yogurt samples (20%) did not have any antimicrobial effects. Only 1 yogurt sample exhibited antimicrobial effect on more than 50% of the tested isolates.
Conclusion: Our results suggested that some samples of non-industrial yogurts have an antibacterial effect on Shigella and Salmonella. However, neither of them had an influence on more than 51.5% of isolates. Therefore, reliance on yogurt as a standalone treatment is not recommended.
References
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Copyright
© 2015, Modern Care Journal. This open-access article is available under the Creative Commons Attribution-NonCommercial 4.0 (CC BY-NC 4.0) International License (https://creativecommons.org/licenses/by-nc/4.0/), which allows for the copying and redistribution of the material only for noncommercial purposes, provided that the original work is properly cited.
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